Revert "init: DROP: clobber-state: Never display progress bar."

It is told that disabling progress bar does not help.
This reverts commit 93a56aef22b4a3b5b7cb2c54df28023de44ba323.

BUT=chrome-os-partner:43469
TEST=none

Change-Id: I8950790cb756c92138bca1c1f924793b141f6663
Reviewed-on: https://chromium-review.googlesource.com/290523
Commit-Queue: Hung-Te Lin <hungte@chromium.org>
Tested-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
diff --git a/init/clobber-state b/init/clobber-state
index 58d8f05..0776264 100755
--- a/init/clobber-state
+++ b/init/clobber-state
@@ -115,8 +115,7 @@
   FULL_BLKS=$(($FS_BLOCKS / $BLOCKS_4M))
   REMAINDER_SECTORS=$(($FS_BLOCKS % $BLOCKS_4M))
 
-  # WORKAROUND (crosbug.com/p/43469): Never show progress bar.
-  if false; then
+  if type pv; then
     # Opening a TTY device with no one else attached will allocate and reset
     # terminal attributes. To prevent user input echo and ctrl-breaks, we need
     # to allocate and configure the terminal before using tty for output.